Perhaps you should try some spelling variations:
"luan anh va snippets" » "luan danh va snippets", "tuan anh va snippets", "lan anh va snippets", "luan hanh va snippets", "luan anh va slippers"
"ngu java java snippets" » "ngu va java snippets", "ngu java java slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("luan anh va snippets") or ("ngu java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luan anh va snippets") OR ("ngu java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luan anh va snippets ) or ( ngu java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luan anh va snippets") or ("ngu java java snippets"))) or ("locating bug code snippets"))*.